Heat exchanger



ug- 7, 1934. G. T. JAcocKs ET AL 1,969,135

HEAT EXCHANGER Filed April 24. 1931 2 Sheets-Sheet l /1//1/1/1/1//111/1/1//11l1/l1111/Ilz/111111110111 /l /3 lull lll lll Il 50 7 y /5 /l v lll/ George TJ'acoc/fs ORNEY Allg. 7, 1934. G T, JACOCKS ET AL' 1,969,135

HEAT EXGHANGER Filed April 24. 1931 2 Sheets-Sheet v2 i 1 Js INVENTORS John I Krel?l Sfan/eL/JC ue George rJbcoc/rs oRNEY Patented Aug. 7, 1934 UNITED STATES PATENT .OFFICE HEAT EXCHANGER Application April 24, 1931, serial No. 532,580l

7Claims.

This invention relates to heat exchangers particularly of the tubular type wherein banks of tubes are employed in a. shell.

An object of the present invention is to provide an improved heat exchanger of the aforesaid type which will be simple in construction, and sturdy and eflicient in operation. A further object bf this invention is to provide improved joints for the elements of the exchanger.

l0 Other objects and advantages obtained by the instant invention will appear from the description hereinafter set forth.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a view of a heat exchanger embodying this invention, the right half being a longitudinal sectional view and the left half being a side elevation; Figure 2 is a sectional view of part of the joint structurev of the exchanger shell and its cover; Figure 3 is a sectional view of a part of the joint structure of the exchanger shell, tube sheet, and channel; Figure 4 is a sectional view of a part of the joint structure of the oating header; Figure 5 is a sectional view of a part of the joint g5 structure of the exchanger shell, tube sheet and a modied form of channel; Figures 6 to 9 inelusive, are diagrammatical views of certain parts of the exchanger illustrating theV improved method of manufacturing the same; Figure 6 is a transverse section of the cover for the floating header, showing the same before its dome has been form-pressed into shape, and indicating the complete dome by broken lines; Figure 7 is a plan view of half of the cover disc of Figure 6; Figure 8 is a transverse section showing the modified form of channel before the same has been form-pressed into its annular shape. and indicating its nal annular form by broken lines; and Figure 9 is a plan view of half of the channel disc of Figure 8.

In the practice of the invention referring descriptively to the specific embodiment thereof which has been selected for exemplication herein, the improved heat exchanger comprises a cylindrical shell l, having an inlet port 2 and an outlet port 3. The ports 2 and 3 are provided with flanged collars 4 and 5, for connection with pipes, not shown. A tube sheet 6 is disposed transversely at one end of the shell, and

an annular channel 7 is disposed adjacent the tube sheet.

To securely join together the shell 1, tube sheet 6, and channel 7, the shell at this end is outwardly flanged and shaped to provide a hook 8, and a ring 9, having an inner diameter of the same dimension as the exterior diameter of the cylindrical shell 1, is disposed around the shell adjacent the hook 8 (see Figure 3). The inner periphery of the ring 9 is cut away on one side to provide a hook of corresponding 60 shape to the hook 8, which it engages. Between the adjacent surfaces of the hanged end of the shell 1 and the tube sheet 6, a gasket 10, of suitable material, such as a composition packing,

is disposed. The inner end of the channel 7, adjacent the tube sheet 6,'is outwardly flanged and shaped to provide a hook 11, and a gasket 12, similar to the gasket l0, is interposed between the tube sheet and the anged end of the channel. A ring 13. similar to the ring 9, is disposed around the channel engaging the hook 11. The rings 9 and 13 are provided with a plurality of correspondingly spaced orices 14 and 15 respectively, and bolts 16 are passed through said orifices and are provided with nuts at their 7B threaded ends, which are drawn up tight to effect the tight jointure of they shell, tube sheet, and channel. It will be understood that the rings 9 and 13 as well as the similar rings employed in other parts of the exchanger hereinafter referred to will be mounted on the respective parts which they engage, prior to the formation of the adjacent flanges.

The outer edge of the channel 7 is outwardly anged and shaped to provide a hook 17. A concavo-convex channel cover 18 is disposed over the open end of the channel 7 and is provided with an outwardly extending flange 19, which projects beyond the Banged outer edge of the channel, and is provided with a plurality of spaced orifices 20. Hook bolts 21 are passed through the orices 20 and their hooked heads engage the hook 17 of the channel. Nuts are provided on the outer ends of the bolts 21 and are drawn up to effect the tight union of the cover 18 to the chan- 95 nel 7. A gasket 23, similar to the gasket l0, is disposed between the ilange 19 and the outer edge of the channel. 'Ihe channelA is provided with inlet and outlet ports 24 and 25, respectively, and flanged collars 26 and 27 are provided for 10o said ports, for connection with pipes, not shown. l A transverse wall 28 is mounted on the inner side of the cover 18 between the ports 24 and 25 and a wall 29 in line with the wall 28 is formed trans- 105 versely of the channel thus dividing the interior of the channel into two separate compartments. Between the inner edge of the wall 29 and the tube sheet 6, and between the outer edge of the Willl .2S and the edge of the wall 28, gaskets 30 110 and 31, respectively, are provided, the gaskets being of similar material to the gasket 10.

The tube sheet 6 is provided in the usual manner with a plurality of spaced orices through which the ends of parallel tubes 32 pass, the same being tightly held in position by the sheet.

At-the opposite ends of the tubes 32, a floating header is provided. The tubes are passed through tube sheet 33 and held in position thereby in the same manner as in the tube sheet 6. The inner face of the tube sheet 33 (see Figure 4) is provided with an inwardly inclined groove 34 around its periphery. A concave-convex cover 35 is disposed over lthe outer side of the oating tube sheet 33, and is provided with an outwardly extending flange 36, which projects beyondthe periphery of the sheet 33, and is provided with a plurality of spaced orifices 37. Between the ange 36 and the sheet 33, a gasket 38, similar to the gasket 10', is disposed. Hook bolts 39 `are passed through the orifices 37, and their heads engage the groove 34. Nuts are provided on the ends of the bolts 39 and are drawn tight to effect a tight connection between the tube sheet 33 and its cover 35. It will be apparent that the tube sheet and its cover provide a compartment or header at this end of the tubes 32 which is free to move as the tubes expand or contract by reason of varying temperatures.

At the end of the heat exchanger, adjacent the tube sheet 33, the shell i is provided with an outwardly extending flange 4l (see Figure 2). Adjacent the ange 41 and around the shell 1, a ring 42 is disposed. The outer side of the ring 42 is provided with an inwardly inclined peripheral groove 43. Adjacent this end of the shell l, a concavo-convex cover 44 is disposed, enclosing the end of the exchanger and housing the floating header. The edge of the cover 44 is outwardly flanged and shaped to provide a hook 45, similar to the hook 3. A ring 46, similar to the ring 9, is disposed around the cover 44 and provided with a hook on its inner periphery which engages the hook 45. A plurality of spaced orifices 47 are formed in the ring 46, and hook bolts 48 are passed through the orices and their heads engage the ring 42 in its groove 43. Nuts are provided on the ends of the bolts 48, and are'drawn up to effect a tight union of the jointure. A gasket 50, similar to the gasket 10, is disposed between the flange 41 and the anged edge of the cover 44.

Referring to Figure 5, there is here illustrated a part of the joint structure of the exchanger shell, tube sheet, and a modied form of channel. In this instance the inner end of the channel 7, adjacent the tube sheet 6, is provided with an outwardly extending flange 51, having spaced orifces 52 formed therein. The end ofthe shell l is flanged and shaped to provide a hook 8, in the same manner as described with reference to Figure 3, and a similar ring 9, having orifices 14, en-

gages the hook 8. Likewise, gaskets 10 and 12 are disposed on the sides of the sheet 6, as in the aforedescribed structure. Bolts 53 are passed through the orifices in the ring and the flange 51, the bolts being provided with nuts which are drawn up to effect a tight engagement of the shell, tube sheet, and channel.

In the operation of the apparatus, uid of one temperature such as cooling water, will be introduced through the orifice 2 into the shell 1, and after passing through the interior of the shell and around the tubes will pass out through the port 3. Fluid of a different temperature such as Locales water to be cooled, will be introduced through the port 24 into the adjacent compartment of the channel 7; it will next pass through the tubes communicating with said compartment, then into the compartment lor header between the tube sheet 33 and its cover 35; it will then pass back through the tubes communicating with the other compartment of the channel; and it will finally pass outk through the opening 25. It will be apparent from the foregoing description that there is provided by the instant invention, a heat exchanger of simple and inexpensive construction. 'I'he exchanger may be speedily and readily assembled and dissembled lby simply loosening the nuts and disengaging the bolts of the joints. The joints constitute novel and improved constructions which affords sturdy, steam tight, simple and eflicient connections. l

Referring to the method of manufacture of certain of the parts of the heat exchanger, it has been formerly the usual practice to manufacture the channel, channel cover and tube sheet cover of cast iron or cast steel, or to fabricate the same by welding or riveting steel rings on the skirts of anged and dished heads. The use of a cast iron structure has been found objectionable in that the same is easily broken by falling objects or the like. While the use of cast steel has been found more satisfactory, this is expensive and presents difficulties because of its tendency toward porosity. Riveted and welded constructions have been generally used, but are objectionable, in that they are expensive andthe various joints and holes necessary in such constructions effect their strength and present possible points of leakage. By the present invention then form-pressed into shape between dies. Such f operations result in a forged part in one piece with a ange that is of the proper thickness for bolting, and wherein the dome is of a reduced weight. The decreasing of the metal in the center done with substantially less power than would otherwise be required.

The method of manufacturing the channel cover is substantially the same as the method -of manufacturing the tube sheet cover, except that the dome portion of the channel cover is pressed out in the opposite direction. Referring to the modified form of channel, an the method of manufacturing the same, this part isalso made of a circular steel disc (Figures 8 and 9). The metal within the periphery of the disc is decreased to the desired thickness, by hogging the same out, as described with reference to the tube sheet cover. A circular oriilce is then of the plate permits the forming operation to be bored through the center of the disc, with suf- It will be understood with reference to both the apparatus hereinbefore described and the method of manufacturing the parts of the same hereinbefore set forth, that many and various changes and modifications in the form, procedure and details of structure may be made without departing from the spirit of this invention as defined in the appended claims, and that all and any such changes or modications are contemplated and are to be considered to be a part of this invention.

We claim as new and desire to secure by Letters Patent:

1. The combination of a shell for a heat exchanger having an outwardly extending flange formed at one end thereof; a ring disposed around said shell, adjacent said flange, and having a groove formed in its outer surface; a cover for the said end of the shell, having an outwardly extending hook-shaped flange; a ring disposed around said cover engaging said hook-shaped flange; and a hook bolt passed through the hookshaped zing and having its hook engaging the groove of said rst mentioned ring.

2. In a heat exchanger, the combination of a shell having an outwardly extending hook-shaped ange at one end thereof; a tube sheet adjacent an end of said shell; a channel having an out- 'zol a bolt engaging said ring and said channel flange. 4. A heat exchanger assembly including in combination an element having an outstanding hook-shaped flange extending in a plane from the axis of said element, a bolting ring having a hook-shaped inner periphery engaging said flange,` said bolting ring having a plurality of orifices formed therein, bolts positioned in said orices, a heat exchanger member,.means seated against said member and engaged by said bolts, the construction being such that said flange is clamped between said ring and said member by means of the bolts and said means.

5. In a heatexchanger, a cover having an outstanding hook-shaped flange, a heat exchanger member having a flange, said hook-shaped ange being sealed against said. member angeand means for clamping said flanges together, said f clamping means having a hook-shaped portion seated on said hooked iange.

6. In a heat exchanger, a member having an outstanding hook-shaped flange, a second member having a ange sealed against said hookshaped flange and means including hook-shaped means seated on said hook-shaped flange for clamping said flanges together.

'7. In a heat exchanger, a fixed tube sheet, a heat exchanger member sealed against one side of said tube sheet, a second heat exchanger member sealed against the other side of said tube sheet, one of said members having an outstanding hook-shaped ange, the other of said members having a flange, and means including hook-shaped means seated on said hook-shaped flange for clamping said members and tube sheet together.

GEORGE T. JACOCKS. JOHN L. mIEG. STANLEY J. CHUTE. 

